Your neck problem seems solvable (which is good), but if the truss rod nut is stiff both ways, it is worth taking it off, cleaning and oiling it.

The volume control knob issue is strange, and moves into an area where I've had no experience; left-handed guitars. Both volume knobs should turn the same way, but after a web search, there is debate about whether this is ideally clockwise (as on a right-handed guitar), or anti-clockwise (which would seem more natural to me but involves using anti-log pots for at least the volumes, and either knobs with no numbers on or specialised reverse numbered knobs).

What are you used to, Keith?

Can you take a picture of the rear of the control plate showing the wiring? If the wiring of both pots looks the same, then it's possible the factory have fitted one log and one anti-log pot. If they've simply crossed over the wiring on one pot, it's a simple matter to fix (if you have any basic skill with a soldering iron). If it's the same wiring and you've got mixed pots, then you'll either need to return the plate to PBG for a replacement, or you could simply replace the pots (I'd get some upgraded ones whilst you're at it) and re-wire the control plate yourself.

Either way I'd drop Adam an email, as a pre-wired control plate should be 100% correct and he needs to let the factory know.